I saw it described as a melee, a brawl and a skirmish. Whatever tight end Martellus Bennett and cornerback Kyle Fuller got into at practice Monday, it calls for a stronger Marc Trestman.

Bears players are channeling their inner stupid. The coach can’t get their attention on this issue. This loss of discipline continues. This is not a good look for the second-year coach who ought to look like he’s in charge.

Remember, Trestman made a big deal out of the issue. Training camp scuffles hurt the team, Trestman said, projecting such things occurring in games.

But even after Trestman lectured everybody early in camp about the need for discipline, the loss of discipline continues.

It began with new defensive end Lamarr Houston and right tackle Jordan Mills. Skirmishes broke out a couple other times over the next few days. And again Monday.

Fuller delivered an aggressive hit trying to strip the ball and took Bennett to the ground. Bennett jumped to his feet, threw Fuller to the ground, then grabbed him by the facemask while unleashing a profane tirade.

In a game, that’s a fine, a penalty and probably an ejection for Bennett. Third-and-long.

Bennett's reaction — or overreaction — was both explosive and disruptive, packing enough rage that it convinced coach Marc Trestman...

BOURBONNAIS — The hit from rookie cornerback Kyle Fuller was hard, a tad high and packed enough force that it sent Bears tight end Martellus Bennett to the ground.

Bennett's reaction — or overreaction — was both explosive and disruptive, packing enough rage that it convinced coach Marc Trestman...

(Dan Wiederer, Tribune reporter)

In practice, it a stupid thing to do to a teammate.

Oh, and practice was cut short after the episode, another way that a lack of discipline hurts the team.

Trestman and the players tried to shrug it off as just something that happens.

“Family, you know,’’ Fuller said. “You get into fights and things like that. At the end of the day, you’re all good.’’

“It’s practice,’’ Bennett said. “At practice (bleep) happens.’’

It has happened too often in the first two weeks of Trestman’s camp.

“We are a family,’’ Trestman said, “and families fight.’’

But wait, didn’t Trestman explicitly tell them not to fight? Yes, several times. But they’re not listening to their coach, and that’s disturbing.

I’m not trying to play Chicken Little here, but everything Trestman does in practice is meant to mirror games. This, then, according to Trestman’s criteria, is a bad sign. It’s not clean. It’s not efficient. It’s not productive. It’s not what Trestman says he wants from his team.

Trestman has better things to do than deal with scuffles interrupting what are now shorter training sessions. Players ought to know right from wrong.

Most importantly, the coach already told his players that’s not acceptable, but they don’t seem to get it. Or Trestman can’t seem to control it.

Trestman’s players should’ve understood it after he lectured Houston and Mills for the first incident. The coach later made the point that if it had happened during a game, both players would’ve been ejected. But stuff still happens.

Some might interpret this as a sign of a more aggressive and better defense that is challenging a good offense. Great. I hope the defense is more ferocious. But within the rules. Otherwise, it’s stupid play and ineffective coaching.

Here’s the deal: Playing aggressive defense without discipline makes you the Lions. You don’t want to be the Lions. You want to look like your coach is in charge.